US-12622819-B2 - Disposable diaper

US12622819B2US 12622819 B2US12622819 B2US 12622819B2US-12622819-B2

Abstract

A disposable diaper includes a diaper body having a top sheet, a back sheet, and an absorber disposed therebetween, the disposable diaper extending from a backside portion to an abdominal side portion; a side flap provided in each of side portions of the backside portion, the side flap extending outward beyond the absorber in a width direction; and a fastening tape that is provided in the side flap to be fastened to the abdominal side portion when the diaper body is used. The fastening tape includes a fixed portion fixed to the side flap, and a protruding piece extending outward from the fixed portion in the width direction. The fixed portion includes a notch in a lower region that is closer to a leg side of a wearer than the protruding piece. The notch is recessed from an outer edge in the width direction toward an inner side.

Inventors

Aya OSHIMA

Assignees

DAIO PAPER CORPORATION

Dates

Publication Date: 20260512
Application Date: 20220301
Priority Date: 20210913

Claims (3)

1 . A disposable diaper comprising: a diaper body that comprises a front surface sheet, a back surface sheet, and an absorber disposed between the front surface sheet and the back surface sheet, the diaper body extending from a backside portion of the diaper body to an abdominal side portion of the diaper body; a side flap that is provided in each of side portions of the backside portion, the side flap extending outward beyond the absorber in a width direction of the diaper body; and a fastening tape that is provided in the side flap to be fastened to the abdominal side portion when the diaper body is used; wherein the fastening tape comprises: a fixed portion that is fixed to the side flap; and a protruding piece that extends outward from the fixed portion in the width direction; wherein the fixed portion comprises a notch in a lower region of the fixed portion that is closer to a leg side of a wearer than the protruding piece, the notch being recessed from an outer edge in the width direction toward an inner side in the width direction, wherein the fixed portion comprises a non-fixed region that is not fixed to the side flap, and wherein the non-fixed region extends from the notch in a direction passing through the lower region of the fixed portion.
2 . A disposable diaper comprising: a diaper body that comprises a front surface sheet, a back surface sheet, and an absorber disposed between the front surface sheet and the back surface sheet, the diaper body extending from a backside portion of the diaper body to an abdominal side portion of the diaper body; a side flap that is provided in each of side portions of the backside portion, the side flap extending outward beyond the absorber in a width direction of the diaper body; and a fastening tape that is provided in the side flap to be fastened to the abdominal side portion when the diaper body is used; wherein the fastening tape comprises: a fixed portion that is fixed to the side flap; and a protruding piece that extends outward from the fixed portion in the width direction; wherein the fixed portion comprises a notch in a lower region of the fixed portion that is closer to a leg side of a wearer than the protruding piece, the notch being recessed from an outer edge in the width direction toward an inner side in the width direction; wherein the side flap is formed by laminating the front surface sheet and the back surface sheet, and comprises a non-adhesion region where the front surface sheet is not bonded to the back surface sheet, and wherein the non-adhesion region extends from a position where the notch overlaps in a direction passing through the lower region of the fixed portion.
3 . A disposable diaper comprising: a diaper body that comprises a front surface sheet, a back surface sheet, and an absorber disposed between the front surface sheet and the back surface sheet, the diaper body extending from a backside portion of the diaper body to an abdominal side portion of the diaper body; a side flap that is provided in each of side portions of the backside portion, the side flap extending outward beyond the absorber in a width direction of the diaper body; and a fastening tape that is provided in the side flap to be fastened to the abdominal side portion when the diaper body is used; wherein the fastening tape comprises: a fixed portion that is fixed to the side flap; and a protruding piece that extends outward from the fixed portion in the width direction; wherein the fixed portion comprises a notch in a lower region of the fixed portion that is closer to a leg side of a wearer than the protruding piece, the notch being recessed from an outer edge in the width direction toward an inner side in the width direction; and wherein the fixed portion comprises a fragile structure at a periphery of the notch, the fragile structure suppressing rigidity of the fastening tape.

Description

CROSS-REFERENCE TO RELATED APPLICATION The present application is based upon and claims the benefit of priority of Japanese Patent Application No. 2021-148996, filed with the Japan Patent Office on Sep. 13, 2021, the entire disclosure of which is completely incorporated herein by reference. TECHNICAL FIELD The present disclosure relates to a disposable diaper. BACKGROUND A disposable diaper with fastening tapes that fasten a backside portion and an abdominal side portion of a diaper body at the time of wearing the diaper is known (see, for example, Patent Literature 1: JP 2010-136788 A, Patent Literature 2: JP 2012-120663 A, and Patent Literature 3: JP 2021-074077 A). Here, in a conventional disposable diaper, a diaper body includes a side flap on each side of a backside portion, and each fastening tape includes a fixed portion fixed to the side flap and a protruding piece extending from the fixed portion to an outside of the diaper body in a width direction. In addition, Patent Literatures 1 and 2 disclose a configuration in which a cutout or notch is formed in the fixed portion, wherein the notch is recessed from an inside edge of the diaper body in the width direction toward an outside in the width direction. Furthermore, Patent Literature 3 discloses a configuration in which the fixed portion extends below the protruding piece (toward a leg side of a wearer). SUMMARY Meanwhile, the fixed portion of the fastening tape disclosed in Patent Literatures 1 and 2 does not extend below the protruding piece (toward the leg side of the wearer). Therefore, when the backside portion and the abdominal side portion are tied together, a force that acts on a lower portion of the side flap is weakened to reduce the fit of the diaper body around the legs. Furthermore, in the fastening tape disclosed in Patent Literature 3, the fixed portion extends below the protruding piece (toward the leg side of the wearer). This extension of the fixed portion increases the rigidity of a part of the side flap that is lower than the protruding piece. Therefore, when the backside portion and the abdominal side portion are fastened together, and the lower portion of the side flap is not deformed properly, which reduces the fit of the diaper body around the legs. In view of the above, it is an object of the present disclosure to provide a disposable diaper capable of improving the fit of a diaper body around the legs. To achieve the object described above, a disposable diaper of the present disclosure includes a diaper body that includes a front surface sheet, a back surface sheet, and an absorber disposed between the front surface sheet and the back surface sheet, the diaper body extending from a backside portion of the diaper body to an abdominal side portion of the diaper body: a side flap that is provided in each of side portions of the backside portion, the side flap extending outward beyond the absorber in a width direction of the diaper body: and a fastening tape that is provided in the side flap to be fastened to the abdominal side portion when the diaper body is used. The fastening tape includes a fixed portion that is fixed to the side flap; and a protruding piece that extends outward from the fixed portion in the width direction. The fixed portion includes a notch in a lower region of the fixed portion that is closer to a leg side of a wearer than the protruding piece, the notch being recessed from an outer edge in the width direction toward an inner side in the width direction. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an external perspective view illustrating the state of use of a disposable diaper in Example 1. FIG. 2 is a plan view illustrating the disposable diaper in Example 1. FIG. 3 is an enlarged view of a portion A in FIG. 2. FIG. 4 is an enlarged view of a portion B in FIG. 3. FIG. 5 is an explanatory diagram illustrating wrinkles generated by the use of the disposable diaper in Example 1. FIG. 6 is an enlarged view illustrating a principal portion of the disposable diaper in Example 2. FIG. 7 is an enlarged view of a principal portion illustrating a variation of the disposable diaper in Example 2. FIG. 8 is an enlarged view of a principal portion illustrating a first variation of a disposable diaper. DETAILED DESCRIPTION A disposable diaper according to the present disclosure is described with reference to Examples 1 and 2 illustrated in the drawings. Example 1 A disposable diaper 1 of Example 1 is a diaper that is attached to a wearer P by a caregiver. As illustrated in FIG. 1, at the time of use of the disposable diaper 1, the wearer P is covered with a diaper body 10 from his or her back through a crotch to his or her abdomen. As illustrated in FIG. 2, the disposable diaper 1 includes the diaper body 10 and fastening tapes 20. The diaper body 10 includes a backside portion 10X, a crotch portion 10Y, and an abdominal side portion 10Z. The fastening tapes 20 are provided in the diaper body 10. The backside portion 10